live in sfo allie rasmus ktvu channel 2 news. >>> we have new details on a powerful storm system that brought blizzard conditions to the central u.s. and spawned a tornado. three people were killed including two in iowa. the storm knocked out power to 400,000 homes and businesses in 13 states and produced a tornado in mobile, alabama. airlines were forced to cancel 600 flights at chicago o'hare international airport. >>> firefighters says it appears no one was inside the house when it the fire started. firefighters believe a candle or cigarette may have started that fire. >>> a is woman in the hospital after life threatening injuries after a car hit a group of people. the four victims were walking near a scenic outlook when a car went speeding by. one managed to get out of the way. the others appear to have been hit by the car. >> the fire department responded to the medical call and the victims were about 30 feet down the hill. they had to bring him up the hill. >> one victim told ktvu he was walking with his mother and two friends visiting from wisconsin when the car hit him. the ca